Advanced queries/Normalized is similar to Timeline, but code size and compilation time data can be viewed on one common diagram with the normalized percentages rather than the absolute numbers. If you choose mainline from the branch menu, i386-elf from target, 2004-03-12 12:00:00 2004-07-03 12:00:00 from time period, 2004-07-03 12:00:00 normalization date and -Os from flag, and 2.x.x from CSiBE test bed version.
This chart is normalized to 2004-07-03 -Os. The compilation time with both flags increased on 2004-05-10 by 21% (-Os) and 19% (-O2). The code size generated with -Os was 1.25% smaller after this change.